* {
    margin: 0;
    padding: 0;
}
ul,
li {
    list-style: none;
}
img {
    display: block;
}
html,
body {
    height: 100%;
}
.clearfix:after {
    content: "";
    display: block;
    clear: both;
}

#main {
    height: 100%;
    display: flex;
    flex-direction: column;
}
